Page History
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Note however, that any one of the 3 windows can be redisplayed without causing the top or bottom border or any existing window to disappear. For example, redisplaying window 2 would cause a display like this:
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| ............... ............. : :................................ : : : :.......... : : : : : WINDOW : WINDOW : : WINDOW : TWO : THREE : : ONE : : : : : : : :
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If window 1 was then redisplayed, the resulting display would look like this:
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Or, where an overlap occurs, no overlap of the top or bottom LEFT HAND CORNERS of the other window occurs. (e.g.: 4 overlaps 3, but does not overlap its top or bottom left hand corners).
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| ........................................... ............ ............. : : |
If window 1 was then redisplayed, the resulting display would look like this:
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This technique merely involves combining techniques 1 and 2 together with a "plan" of the windows and testing each window against some simple rules.
Consider the following example for 4 windows. Any of the windows can be redisplayed at any time without upsetting any other window.
Note how every window, but one, conforms to the following rules.
- Is completely separate from (and therefore does not overlap) another window (e.g.: 4 is separate from 2).
- Or, completely contains another window (e.g.: 1 completely contains 4).
- Or, is completely contained within another windows (e.g.: 4 is completely contained within 1).
Or, where an overlap occurs, no overlap of the top or bottom LEFT HAND CORNERS of the other window occurs. (e.g.: 4 overlaps 3, but does not overlap its top or bottom left hand corners).
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............................................................. .............................................................. ........................... ..... : : : : : :..................... : : : : : 3 : : : : : : : : : : : : : : 4 : : : : : : : : : : : : : : : : : : : :.: : .......................................: : : : : : ::.................................. : :..........................: |
Note that window 1 does not conform to these rules. It overlaps the top and bottom left hand corners of window 3, and therefore could cause the top and bottom border areas of window 3 to "disappear".